MP1542

700KHz/1.3MHz Boost Converter

with a 2A Switch

MP1542 Rev. 1.3

www.MonolithicPower.com

1

9/7/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP1542 is a current mode step up

converter with a 2A, 0.18Ω internal switch to

provide a highly efficient regulator with fast

response. The MP1542 can be operated at

700KHz or 1.3MHz allowing for easy filtering

and low noise. An external compensation pin

gives the user flexibility in setting loop

dynamics, which allows the use of small, low-

ESR ceramic output capacitors. Soft-start

results in small inrush current and can be

programmed with an external capacitor. The

MP1542 operates from an input voltage as low

as 2.5V and can generate 12V at up to 500mA

from a 5V supply.

The MP1542 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload. The MP1542 is available in low profile

8-pin MSOP packages.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV1542DK-00A

2.0”X x 2.0”Y

FEATURES

• 2A, 0.18Ω, 25V Power MOSFET

• Uses Tiny Capacitors and Inductors

• Pin Selectable 700KHz or 1.3MHz Fixed

Switching Frequency

• Programmable Soft-Start

• Operates with Input Voltage as Low as 2.5V

and Output Voltage as High as 22V

• 12V at 500mA from 5V Input

• UVLO, Thermal Shutdown

• Internal Current Limit

• Available in 8-Pin MSOP Packages

APPLICATIONS

• LCD Displays

• Portable Applications

• Handheld Computers and PDAs

• Digital Still and Video Cameras

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

3.3V

8V

MP1542

SW

IN

FB

COMP

1

2

6

7

3

8

4

5

SS

GND

EN

FSEL

OFF ON

D1

C4

10nF

C3

2.2nF

95

90

85

80

75

70

65

60

55

50

LOAD CURRENT (mA)

Efficiency vs

Load Current

1

10

100

1000